211111093 has 4 divisors (see below), whose sum is σ = 211142668. Its totient is φ = 211079520.

The previous prime is 211111079. The next prime is 211111129. The reversal of 211111093 is 390111112.

211111093 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 196196049 + 14915044 = 14007^2 + 3862^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211111093 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211111093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211111003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1368 + ... + 20593.

It is an arithmetic number, because the mean of its divisors is an integer number (52785667).

Almost surely, 2^211111093 is an apocalyptic number.

It is an amenable number.

211111093 is a deficient number, since it is larger than the sum of its proper divisors (31575).

211111093 is an equidigital number, since it uses as much as digits as its factorization.

211111093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31574.

The product of its (nonzero) digits is 54, while the sum is 19.

The square root of 211111093 is about 14529.6625218895. The cubic root of 211111093 is about 595.4386455419.

Adding to 211111093 its sum of digits (19), we get a palindrome (211111112).

It can be divided in two parts, 21111109 and 3, that added together give a palindrome (21111112).

The spelling of 211111093 in words is "two hundred eleven million, one hundred eleven thousand, ninety-three".